Piston ring



IVI. E. SIPE.

PISTON RING. PPPPP cATxoN FILED IUN'EQ 1920.

1,427,975 Patendsept. 5, w22.

Patented Sept. 5, 1922. y

MARTIN asien, or MINNEAPOLIS, \iiriiinIssoire,l2 .assieision sEALrrI'rlE IIsroiv nINGco., on MINNEAPOLIS, MINNnsorA,zi conroanrion orMINNnsorA.

y y PIs'roN limite.

y Appiiction aise Iene 9,

TQ @ZZ whom it ma t concern.' -r

Beit known that. MARTN E. SIDE, a C1131;

`zgeiif of the United States, residing at Minne- ,-apjol is, 4in the county of Hennepin and State 1 5 of M'nnesota, have inventedcertain new and useful lmprovements lin 'Piston Rings; and fdo hereby declare the following to be a full,

cleaigand exact description ofthejinyention, such as` will enabley others'skilled'pinthe ait` to which it appertains to make anduse the same. A

'My' present invention providesl an 1mproved lpiston ring that iskv not only strong, durable and efficient as'alnon-leakringin actua-l' operation,'biit which is capable of being terlapping flanges or webs cut or formed inrtegra'lwith the ring,l The present invention `brings this type 'of' ypiston ring to its `highest pointof' perfection, byprovidingan arrange- `ment of' flanges and :webs that interlap in such manner las vto form the vmost efficient kind of a non-leakjoinn'and ,inwhich the l interlappingflanges and webs,` which are necessarily reduced in cross section as com` paredwith the body'ofthe ring, are neven tlieless, given the greatestv possiblestrength. In the" accompanying ,drawings`-l 'whichI ners where@ the ciitfislinet made completely illustrate this vimproved ring, Vlikev characters indicate like parts ythroughout 'theseVera-l y *A l arrangement offthe flange and web, however,-jmakes it vpossible :tosusei an ordinary Views.. y l

Referring tothe drawings Figyl' is a persl'jective View showing the 40 piston ring designed in accordance with my invention; y

Fig. 2 is a side elevation showing portions of the ring;

the end Fig. 3 is a view corresponding toFg.,2,`

but showing the joint of the ring closed by interlapping of the reduced end flanges and webs thereof; v

Fig.y 4: is a plan View looking at the AeXterior of the end portions of the ring shown in Fig. 3;

Fig. 5 is a fragmentary perspective 'showing one of the ends ofthe ring;

Fig. 6 is a section on the line 6-6 of Fig. 1;

i920. serial Na; 387,555; f f

Fig. 7 is a section on the line'YQJ of Fig. l1;a'n`d l `I F igfS is a section onthe v.line 8-48 of l lhe body of the ring',f\ifhich maybe of cast' iron or other suitable metal, lis, indicated by" the niimerali, and thiswring is transverselysplit. at one point and4 formed with' interlap'ping ends preferablymade as follows: l

yThe rioht hand end of the rin@ as shown in Fig. A1, is milled out and reduced in radial Lthickness to forni a: web-10 land a flange 11.

The web lOiandlfllange .11 terminate on the same transverse line 'at'the endof thering,

but the webr 10 extendsconside'rably further circumferentially backward on Athe outer portion of thering than does the milled por-- 4tion ofthe flange 1`1fln a transverse direc-1 tion, kthe web 10 is much wider than the flange' llfbut'l the flange .11, :in a direction yradiallyofthering, is milch deeper than the saidweb 10.- Both the web `10V and tlieflange 11j are formed with rounded shoulders and rounded ends, andi said`` 'rounded `shoulders form fillets which yery greatlyistrengthen the saidv flange and web. sual'ly,`in making ringso-f this general type,-` the webs or -flanges cutv completely across with square corners,` and itis awell known fact that these reducedend por-tions arethus .made very weak `andliabl'e to be broken"` off; at., their corner angles. Moreover, in.` practice, it is rpractically impossible-to mill out .squarecon 'across the face of :the ring. y The described For co-'operation with the end formed,1as

jiiststated, ythe left-hand end of thering, as

shown in Fig. 1, is reversely milled, that is, is milled out on its inner surface to form an end web 12 and a flange 13. The web 12 and the flange 13 terminate on the same line, at K' their'inner extremities, but at the end of the ring, the flange 13 projects considerably' further thanthe said web. rIhe projection of the flange lbeyond the web 12 should correspond to the extension of the web 10 bein a transverse'direction, is much wider andy in a radial direction is much deeper than the web l2. rlhis flange 13 is the only part of the ring that, in itself, projects beyond any other end portion of the ring, Aand hence,

it is obviously important that it be given the greatest possible amount of metal in cross section. It will be noted that in the right hand end of the ring, as shown in Fig. l, the web l and flange 11 mutually reinforce each other and thatneitlier projects :beyond the other, at least to any appreciable extent. f

The web l2 and flange 13, like the web 10 and flange 1l, may be cut by an ordinary end milling cutter used as above indicated. rlhe passage of the milling tool through-the ring to form the ends, as stated, will leave the ringv with a gap substantially as shown in v Fig. l, and usually, this will bejust about i iron, so that the thin portion thereofis yre`y the condition ofthe ring required to give the desired tensionA when the ring is contracted so that its end portions interlap substantially as shown in Figs. 3 and 4. Obviously, when the ends of the ring are interlapped, as shownin these two views, a l vnon-leak joint is produced, that is the end Vjointof the ring will be closed against the passage of gas, steam, air, oil or other fluid therethrough, either in a transverse direction or in a radial direction.

By referring to Figs. 6, 7 and 8, it will be noted that both milled' ends of the ring are approximately L-shaped in cross section,v

that is,have somewhat the form of an angle inforced by a flange. This feature is also highly important `lt will also be noted that the milled face of one of the ends faces ra-` y dially outward, While the milled portion of .the other end faces radially inward, and that -the two milled portionsare reverse, the one the one will closely lit to the other, so that the other, l

This ring, is therefore, not only capable of being easil" and cheaply made in a factory, but is highly efficient, strong and durable in operation.

What l claim is: f

l. yA piston ring provided at one end with a radially outwardly facing reduced portion forming a web and a web reinforcing flange laterally adjacent thereto, the said web and flange terminating on the same transverse line at the end of the ring, said web, in respect to said flange being relatively long, wide and shallow, and the said ring, at its other end having an inwardly facing reduced portion forming a web and a laterally adjacent reinforcingflange, said latter web and flange terminating on the same line at .their inner extremities, ysaid latter flange being, in respect to said adjacent web, relatively wide, radially deep and circumferentially long, so that it projects at that end of the ring beyond said adjacent flange, saidv flange on the latter noted end ofsaid ring fitting the web on the first noted end of the ring,y and the fiange on the first noted end of the ring fitting the web on the second noted end of said ring. y

2. A split piston ring having one of its ends formed with a portion of reduced ra dial thickness and extending across the greater part of the width of the ring, a reinforcing flange at the side of said portion j extending for the remaining distance across the ring, said reduced portion and said flange having a curved portion connecting them t0 the inner and-outer surfaces of the lring, said portion and flange terminating in ,into sectionsof diiferentlength, said sections also being of different radial thickness and terminating at one end in curved surfaces having a common terminal line.

In testimony whereof I Iaffix my signature.

. MARTIN E. SIPE. 

